JPS59104598A - Device for transporting and storing solidfied package of radioactive liquid waste - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transport and storage device for radioactive waste liquid assimilation packages, and in particular, to transport and store solidified packages received from a radioactive waste liquid treatment system into a transfer chamber from a radiation-shielded solid transfer chamber to a cooling storage room. The present invention relates to a transport and storage device for a radioactive waste liquid solidification package that can be transported to a large area and can prevent concentrated loads of a transport cart on the floor of a transport chamber.

The spent fuel of a nuclear reactor is processed at a nuclear fuel reprocessing plant, and the waste liquid with high radioactivity level generated at that time is packaged as a vitrified material in a radioactive waste liquid treatment system. The plan is to store and store it while cooling it.

In this case, since radioactive substances are handled, the solidified package is received from the radioactive waste liquid treatment system into the transfer chamber, and then transported to the storage chamber arranged in parallel with the transfer chamber. In addition, due to the need to store a large amount of solidified packages in the storage room,
Since the solidified packages are stacked and stored in series in the direction of gravity, a solidified package loading port is formed above the storage chamber, and a solidified package loading port is also formed above the transfer chamber. A transport chamber for transporting the solidified package from the transfer chamber to the storage chamber is formed above the storage chamber and the transfer chamber. That is, a carry-out port and a carry-in port communicating with the transfer chamber and the storage room are formed through the floor of the transfer chamber, and the transfer means is provided on this floor. Possible conveyance means in this case include a tire running truck a as shown in FIG. 1, an overhead crane b as shown in FIG. 2, and the like.

However, in the tire running trolley system, the load of the trolley a is directly applied to the floor C, which receives concentrated loads, so the entire floor must have a strong structure, and there are no protrusions on the floor surface. In addition, the large turning radius of the cart creates a large amount of dead space, resulting in poor cargo handling efficiency. On the other hand, with the overhead crane method, there is a risk that the cask (transfer chamber) d, in which the solidified package is transported while shielding it from radiation, may fall, and there is also the problem of shaking during transportation. It has the disadvantage of being forced to be larger.

Furthermore, in both methods, the solidified package is isolated and transported inside the cask d, but when the solidified package in the transfer chamber is transported into the cask d from the export port, and when the solidified package inside the cask d is When transporting the equipment into the storage room, it is desirable to prevent radiation from leaking into the transport room as much as possible.

The present invention was devised in view of the above-mentioned circumstances, and its purpose is to be able to transport solid packages from a transfer room to a storage room while shielding them from radiation, and to prevent the risk of the casks falling or shaking. The object of the present invention is to provide a transport and storage device for radioactive waste liquid solidification packages that can prevent concentrated loads of a transport cart on the floor of a transport chamber.

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

Figure 3 shows the outline of the transport and storage facility for solidified packages. In the figure, 1 is a transfer chamber for receiving solidified packages 2 in which radioactive waste liquid is packaged as a vitrified substance by a radioactive waste liquid treatment system (not shown). On both sides of the transfer chamber 1, there are storage cabinets 3 for storing the solidified packages 2 while cooling them. The solidification package 2 is formed by enclosing a radioactive waste liquid solidified into glass in a steel container called a canister. Still in storage 3
It has a large number of storage chambers (bits) in the form of four vertical cylinders with an open top for storing the solidification packages 2 stacked in series in the direction of gravity. .

A transfer chamber 6 is formed above the transfer chamber 1 and storage 3 with a floor 5 serving as a partition wall interposed therebetween. This transfer chamber 6 is used to take out the solidified packages 2 from the transfer chamber 1 and store them in the storage 3.
This is the part through which the thinned package is transported to the storage room 4 inside, and is provided with a transport cart 7 for transporting the thinned package. Further, on the floor 5 of the transfer chamber 6, an outlet 8 for carrying out the solidified package 2 from the transfer chamber 1 and an inlet 9 for carrying the solidified package 2 into the storage room 4 penetrate in the direction of gravity. It is provided. In particular, a large number of loading ports 9 are provided corresponding to the storage rooms 4. On the other hand, unloading port 9
One or more are provided, and the solidified package 2 is carried within the transfer chamber 1 by a trolley 10 to below the outlet 8. In addition, the carry-out port 8 and the murder port 9 each have openings @11 that can be detached from the transfer chamber 6 side.
is provided.

The transfer trolley 7 consists of lanes for running on the floor, and specifically, as shown in FIGS. A crane rail 12 is installed along the crane rail 12, a crane girder 13 is supported along both crane rails 12, and the crane girder 13 is supported so as to be freely movable along the crane rail 12. The cask 14 is supported movably along the cask 14. That is, the crane girder 13 has the above-mentioned crane L/
Wheels 15 are rotatably engaged on 12 , and these wheels 15 are rotationally driven by a drive section 16 . The crane girder 13 has an opening 17 continuous along the longitudinal direction at the center in the width direction, and the cask 14 positioned in the opening 11 is movably guided on both sides of the opening 17. A dead rail 18 is provided.

On the other hand, the cask 14 is a transfer chamber made of lead or the like that shields and transfers the solidified package 2 to insulate radiation emitted from the outside (transfer chamber). It has wheels 19 that are movably engaged with the rails 18, and these wheels 19 are rotationally driven by a cask drive section 20. Thus, the cask 14 is configured to have its bottom raised above the floor 5 and to be able to move freely in the x and y force directions together with the movement of the crane girder 13. At the bottom of the cask 14, there is an unloading capacity 2 for general loading or unloading of the solidified package.
1 is formed, and a 7-layer 22 is provided to cover the carry-in/out entrance 21 so as to be openable and closable. This shutter 22 is connected to the screw shaft 240 of the shutter drive section 23.
It is configured to slide open and close in a double-sided manner by rotation.

Further, a hoist 25 is provided at the upper part of the cask 14 to lift and lower the opening/closing lid 11 and the solidified package 2 from the carry-out port 21 into the cask. In this case, the grip 26 attached to the end of the rope of the hoist 250 is a frame body 28 suspended from the first rope 27 as shown in FIGS. 6 and 7. A pair of substantially arc-shaped claws 29 are opposed to each other, and are each pivoted via a pin 30 so that they can be opened and closed freely, while engaging the upper ends of both claws 29 to open and close them. It is preferable to use a grip formed by suspending the engaging body 31 from a second rope.

According to this, the first and second ropes 27. ．． By operating 272, grasp the solidification package 2, opening/closing lid 11, etc.
It is suitable for handling radioactive materials because it can be opened and consists of only a mechanical mechanism without using electrical elements or hydraulic pressure.

Furthermore, a mounting table 32 is provided within the cask 14 on which the assimilation package 2 and the opening/closing lid 11 placed by the general public are placed. Since the hoisting machine 25 can only lower suspended objects such as solidified packages, this mounting table 32 is placed at a distance from the top of the unloading rack 21 when carrying in and out of suspended objects. It is configured to move to the unloading port 21'' which is below the hoisting machine 25 when placing it or lifting it from the placed state. Specifically, as shown in FIG. 8, a cask 1 is formed with a rectangular cross section.
Two mounting tables 32 are provided above the shutter 22 in the container 4 so as to be movable in the longitudinal direction via a rail 33, and both the mounting tables 32 are arranged to stand by on both sides with the carrier 21 sandwiched between them. .

Screw rods 34 are rotatably supported along the moving direction on both sides of the mounting table 32, and a drive unit 35 is provided at the base end of each screw wand 340 to separately drive these. A mounting table 32 is connected to each screw rod 34 via a nut 36. Therefore, each platform 32 can be moved separately in accordance with the loading and unloading of objects to be lifted.

Furthermore, a seal portion 37 is provided at the bottom of the cask 14 to seal between the cask 14 and the floor 5 when a suspended object is carried in and out.

That is, the knoll member 3T is formed of lead or the like into a cylindrical shape having a length equal to or longer than the distance between the bottom surface of the cask 14 and the floor 5, and an inner diameter through which the suspended object can pass. On the other hand, a storage chamber 38 for storing the seal member 37 is formed at the bottom of the cask 14 by aligning the axis of the seal member 37 with the axis of the carry-in/out port 21. Lowering the stored knoll member 37 onto the floor,
A jack 39 is provided for re-storing.

The seal member 37 and jack 39 are still attached to the seal member 3.
It has sufficient strength to support the load of the cask 14 when the cask 7 is lowered onto the floor.

Next, the operation of the above embodiment will be described.

First, when carrying out the solidified package from the transfer room 1,
The cask 14 is positioned above the exit 8 of the transfer chamber 1, and the solidified packages 2 to be transported to the 8 exits are positioned using a trolley 10 or the like.

Next, the seal member 37 housed in the bottom of the cask 14
is lowered onto the 5th floor, and 7 players 22 with an export population of 21 are released. Next, by lowering the gripper 26 of the hoisting machine 250 and lifting up the opening/closing lid 11 that blocks the general outlet 8, the opening/closing lid 11 is moved to one of the loading tables 3 by interlocking operation with the mounting table 32.
2 Place it on top. Accordingly, inside the cask 14 and the transfer room 1
Since the inside communicates with the inside through the sealing member 37, the solidified package 2 is carried into the cask 14 along with the transfer chamber 1 using the hoisting machine 25 again, and this solidified package 2 is placed on the other mounting table 32. After opening and closing the opening/closing differential 11,
Return to Next, after closing the shutter 22 and storing the seal member 37, the crane girder 13 is moved in the state shown in FIG. 4, and the cask 14 is positioned above the storage chamber 4 to be transported. Then, in the same manner as described above, the sealing member 3T is lowered and the opening/closing lid 11 of the loading port 9 is removed, and the solidified package 2 is suspended by the hoisting machine 25 as shown in FIG. The material is charged into the storage chamber 4 through the container. After charging, return the opening/closing lid 11 to the loading port 9, closing the palm tank 22, and sealing member 37.
After sequentially storing the cask 14, the cask 14 is moved onto the exit port 8 of the transfer chamber 1, and the same operation is repeated. In addition, when recovering the stored solidified package 2, the solidified package 2 is transferred from the storage room 4 to the transfer room 1 by the reverse operation described above.
It should be transported to

In addition to transporting the solidified package 2 from the transfer chamber 1 to the storage chamber 4 via the cask 14 which is a closed transfer chamber, the sealing member 37 is also used to transport the solidified package 2 from the transfer chamber 1 to the export port 8 of the transfer chamber 1 and to the cask 14. Between population 21 and storage room 4 entrance 9
Since the space between the cask 14 and the unloading port 21 of the cask 14 is sealed, the solidified package can be safely transported from the transfer chamber 1 to the storage chamber 4 or vice versa while shielding from radiation. In particular, if the transfer trolley 7 is configured with lanes that run on the floor as in the embodiment, there is no need to apply a concentrated load to the five floors unlike in the tire running trolley system, and therefore the entire floor is constructed with a strong structure. Even if there is a protrusion such as the opening/closing lid 11 on the floor, there is no need to move the cask, and since the cask can be moved arbitrarily in the x and y directions, cargo handling efficiency can be improved. In addition, since the lane for floor running supports the cask 14 on the crane girder 13,
Unlike the overhead crane method, the cask can be dropped,
There is no risk of shaking, and there is no need to increase the size of the transfer chamber 6. In addition, in the lane where floor running is carried out, the load of the crane girder 13 and the cask 14 acts on the part on the floor 5 where the rail 12 is provided, so it is only necessary to reinforce that part, and the solidification package 2 When hoisting, the load of the cask 14 etc. can be received through the lowered knoll member 37, so it is possible to prevent a concentrated load on the part concerned and improve the durability of the floor surface.

In summary, the present invention exhibits the following excellent effects.

(1) The solidified package of radioactive waste liquid can be transported from the transfer room to the storage room while being shielded from radiation, improving safety.

(2) The sealing member can disperse and reduce or prevent the concentrated load of the transfer cart and transfer chamber on the floor surface, simplifying the structure of the floor surface on which the transfer cart runs and improving durability. Can be done.

(3) If the transfer cart is used as a floor-running lane, there is no risk of the cask, which is the transfer chamber, falling or shaking, which increases safety and improves cargo handling efficiency.
It is possible to achieve the second goal.

[Brief explanation of drawings]

Fig. J1 and Fig. 2 are side views showing conventionally considered methods as a conveying means, Fig. 3 is a schematic sectional view of the entire device showing an embodiment of the present invention, and Fig. 4 is a floor surface of the transfer cart. 5 is a sectional view taken along the line A-A in FIG. 4, FIG. 6 is a side view of the grip, FIG. A cross-sectional view taken along the line B--B in FIG. 9 is a cross-sectional view for explaining the operation of the present invention. In the figure, 1 is a transfer room, 2 is a solidification package, 4 is a storage room,
7 is a lane for running on the floor as a transfer cart; 8 is an exit; 9 is an entrance; 11 is an opening/closing lid; 14 is a cask that is a transfer chamber; 3
7 is a sealing member. Patent Applicant: Nobuo Kinutani, Patent Attorney, Ishikawajima-Harima Heavy Industries Co., Ltd.

Claims (1)

[Claims] The radioactive waste liquid treatment system receives a solidified package in which the waste liquid is packaged as a vitrified substance, and there is a transfer chamber with an exit at the top for transporting the solidified package. It has an inlet for carrying in the solidified packages carried out from the outlet, and stores assimilation packages in series in the direction of gravity below each of these inlets, and stores the carried in solidified packages while cooling them. a storage room, an opening/closing lid provided at the carry-out port and the carry-in port to open and close them, a transfer trolley that is movable above the carry-in port and the carry-in port, and a cover provided on the transfer trolley to insulate radiation. a transfer chamber which is shielded as much as possible and is used to carry in solidified packages from the transfer chamber and carry them out to the storage room; What is claimed is: 1. A transport and storage device for radioactive waste liquid solidification packages, characterized by comprising a sealing member interposed between the radioactive waste liquid solidification packages.